I will explain how I promoted my eBook. I hope you find my experiences helpful.

Free Book Days with Kindle Direct Publishing Select

I removed my book from iTunes and Nook to join Amazon’s
KDP Select for three
months. KDP Select allows me to offer my book free
for five days out of every 90 days. However,
my book can only be sold on Amazon during this period.

NOTE: KDP is set to renew automatically. I learned about
this when Amazon notified me that I was violating KDP Select Terms because
my book was available on iTunes.

Clear Auto Renew

Manage Promotions

Click
“Actions” -> “Manage Promotions” to open
“Promotions Manager.” Select your free book days. It is helpful to select days at the beginning of your
KDP Select period, because you must wait 90 days for your next promotion.